Liams



8. A. WILLIAMS.

TOOL.

APPLICATION FILED AUG-4| I920.

1 40 9 1 Patented Mar- 7, 1922'.

z'Z Z3 Fy Z UNITED s'rATss PATENT OFFICE.

SHELDON A. WILLIAMS, OF DES MOINES, IOWA, ASSIG-NOR OF ONE-HALF TO HARRYF.

WI-IEATON, OF DES MOINES, IOWA.

TOOL.

Specification of Letters Patent.

r Application filed August 4, 1920. Serial No. 401,149.

To all to item it may concern Be it known that I, SHELDON A. WIL- Lnmrs,a citizen of the United States, and a resident of Des Moines, in thecounty of Poll: and: Stateof Iowa, have invented a certain new anduseful Tool, of which the following is a specification.

The object of my invention is to provide a tool of very simple andinexpensive construction, particularly adapted for use in shaping fibergears.

It is quite common in automobile c0nstruction to connect the timer shaftwith the engine shaft by means of a fiber gear mounted on the cam shaft.The fiber gear is mounted between two discs or plates, each providedwith gear teeth, and the gear on the timer shaft, as well as the gear onthe engine are of such width that they mesh only with the fiber gear onthe cam shaft.

In the use of the fiber gear, the teeth gradually become elongated andproject beyond the teeth of the discs between which the fiber gear isenclosed. When the fiber gear has become mis-shapened to a certainextent, it can not be longer used, and the common practice is to returnit to the factory for exchange or credit or to re-shape it by anelaborate and expensive process with a lathe.

With these and other objects in view, my invention consists in theconstruction and arrangement and combination of the various parts of mydevice, whereby the objects contemplated are attained, as hereinaftermore fully set forth, pointed out in my claims, and illustrated in theaccompanying drawings, in which:

Figure 1 shows a side elevation of a por tion of a gear casing withparts of the gear casing shown in section, and parts broken away, withmy improved tool installed thereon.

Figure 2 shows a detail, sectional view taken on the line 2--2 of Figure1; and

Figure 3 shows an enlarged, side elevation of the roller device.

In the accompanying drawings, I have used the reference numerals 10 and11 for indicating the lower and upper casing members at the front end ofan engine.

Extended through the casing formed by the members 10 and 11 is an engineshaft 12, on which is a pinion 13. Connected with the casing 11 andextending away therefrom is a casing 14;. The casing 14: has therein,spaced from the casing 11, an opening 15, which is ordinarily covered bycasing member. j

The timer shaft extends into the opening 15 and ordinarily has onita'gear, not here shown.

Extending through the casings 11 and 14 is the cam shaft 16, on which isthe fiber gear 1?, on the oppositesides of which are metal discs 18 and19, having teeth on their periphery, which corresponds with the teeth ofthe fiber gear.

It is found in the use of the fiber gear interposed between the twometal gears, that th teeth of the fiber gear become gradually forcedoutwardlyand misshapened. The teeth then extend beyond the teeth of thediscs 18 and 19, as illustrated for in stance at capital A in Figure 3.

In order to reduce these fiber gear teeth to proper shape the ordinarypractice, as has already been said, is to entirely remove the fibergear, re-shape it, and then put it back in position. Frequently thefiber gear can not be repaired at all.

For reducing the teeth of the fiber gea to their normal shape, I haveprovided a special. tool, which includes a cross bar 20, through whichare extended bolts 21. These bolts are extended through holes in thecasing 14, which ordinarily receive the bolts for the cover for theopening 15.

The bar 20 is formed with a bearing 22 for a shaft 28. Extending awayfrom the shaft 23 at right angles thereto is a handle 2 1'. Extendingaway from the shaft 23 in the opposite direction from: the handle 24 andparallel therewith is an arm 25 on theend of which is a spindle 26,arranged at right angles to the arm 25, as shown, for instance, inFigure 2.

On the spindle 26 is a roller 27, which may be made of steel or othermaterial, harder than the fiber gear.

The engine shaft is rotated in any suitable way in the use of my tooland it will be seen that the fiber gear will then be rotated from thepinion 13. The handle 24 is then grasped and the roller 27 is heldagainst the teeth of the fiber gear, as illustrated in Figure 3.

In Figure 3, I have shown at capital A, the fiber teeth projected beyondthe teeth 18 of the disc 18, while at capital B, I have shown the fiberdiscs after my process Patented Mar. '7, 1922.

' in Figure 3 to their-shape shown at B is not accorr rplished atonerevolution of the fiber gear, but Ihave made the showing in Figure 3 forthe purpose of properly illustrating the condition of the fiber gearbefore and after, the practice of my process.

here my toolis used, it is only necessary to remove the cover from theopening 15 and to remove the gear on the timer shaft and install mytool. Then when the engine shaft is rotated, the roller 27 may be heldagainst the teeth of the fiber gear, until such teeth are reduced totheir normal shape and slze. p 7 g It is obvious that it is unnecessaryto remove the fiber gear from; the engine and that the ent re re-shapingof the teeth of the fiber gear may be very "quickly and inexf pensivelyaccomplished, when my process is compared with the old Way ofaccomplishing the same purpose.

t Will be made in the construction of the tool without departingessentially from the real spirit and purpose of my invention. 7 Iclaim:j

1. In a device of the class described, a supporting memberhavingabe'aring, a shaft ,mounted in said bearing, arms extending fromsaid shaft in substantially opposite d rect ons, a spindle on one ofsald arms arranged at right angles to the arm, and a roller on sa dspindle,

52-. in a device of the. class described, the

combination of a fiber gearhaving metal be seen that some variations maydiscs at its sides, provided with teeth corres 'ionding' with the teethof the fiber gear, a metal gear 1n mesh with the fiber gear, a

supporting member having'a bearing,a shaft mounted in said bearing, armson said'shalft, and aspindle on one of said arms, having thereon arotary device adapted tojbe pressed against the teeth of the fiber gear.

Moines, Iowa, July 26, 1920.

SHELDON A. WILLIAMS.

Des

